blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights
  * reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 39 matching lines @@
 class ColorChooser;
 class ColorChooserClient;
 class CompositorAnimationTimeline;
 class CompositorProxyClient;
 class DateTimeChooser;
 class DateTimeChooserClient;
 class Element;
 class FileChooser;
 class FloatPoint;
 class Frame;
-class GraphicsContext;
 class GraphicsLayer;
 class HTMLFormControlElement;
 class HTMLInputElement;
 class HTMLSelectElement;
 class HitTestResult;
 class IntRect;
+class KeyboardEvent;
 class LocalFrame;
 class Node;
 class Page;
-class PaintArtifact;
 class PopupOpeningObserver;
 class WebDragData;
 class WebFrameScheduler;
 class WebImage;
 class WebLayer;
 
 struct CompositedSelection;
 struct DateTimeChooserParameters;
 struct FrameLoadRequest;
 struct GraphicsDeviceAdapter;
@@ skipping 278 matching lines @@
 
   LayoutPoint m_lastToolTipPoint;
   String m_lastToolTipText;
 
   FRIEND_TEST_ALL_PREFIXES(ChromeClientTest, SetToolTipFlood);
 };
 
 }  // namespace blink
 
 #endif  // ChromeClient_h